It's not comforting, indeed.

But you should know that the various space-based positioning systems (GPS, GLONASS, BeiDou etc) are deployed and administered by the respective governments of their countries of origin. They were invented for the military and can be selectively disabled or degraded for civilian users.

Does anyone think it's possible for non-governments to stand up replacements for these systems, from either a technical or legal / political perspective?